Influence of feed additives on the quality of seed of cocks of ROSS-308 parent stock

Abstract

Purpose: to establish the effect of water-soluble liquid feed additives on the quality of the semen of roosters of the parent flock ROSS-308.Materials and methods. The experiments were carried out in the period of 2020–2022 in the hospital of the veterinary clinic of the Faculty of Veterinary Medicine, Food and Biotechnology of the Saratov State Agrarian University. In the experiment, roosters of the parent flock ROSS 308 were used. To assess the quality indicators of the spermogram of the obtained ejaculates and determine the indicator of sperm activity, the selected roosters were divided into three groups: group 1 (n=5) - control; The 2nd group (n=5) of the experimental group received the Reasil Humic Vet feed additive with water, the 3rd group (n=5) of the experimental group received a product containing colloidal selenium, silymarin and a stabilizer (NKS) as nanoparticles.Results. A fairly good volume of ejaculate was obtained from the experimental males, which ranged from 0.5 ml to 1.1 ml. The growth of sperm activity in the 2nd group and in the 3rd experimental group occurred on the 20th day and the next day of the experiment and showed a stable result from 8,5 to 9,5 points. As a result of the experience of studying the quality indicators of sperm in the 2nd and 3rd experimental groups of roosters, high Cv variability values from 32,0% to 54,0% were obtained. Established for the indicator of the concentration of active sperm in the ejaculate: in relation to the fertilization of eggs r = 0,67 ... 0,86, hatchability of eggs - r = 0,52 ... 0,70, hatching of chickens - r = 0,36 ... 0,51.Conclusion. Given the high positive relationship between the concentration of active sperm in the ejaculate of roosters and the incubation qualities of eggs, it is advisable to use this indicator in breeding programs.